A flea told another flea, "It's cold, what can I do?"
"What happened to you?" asked its friend.
"Well, I got a ride down here in a guy's mustache, and he came down here by motorcycle. I nearly froze to death!" it complained.
"I see! I tell you what, you should go to the ladies' washroom. When you get there, get yourself up on the toilet seat, and when a woman comes in to take a leak, you hop on for a nice warm ride. Got it?"
"But this is how I ended up in a guy's mustache!"